This is the first time that the S-300 air defense system has been displayed in public.

The public show in Tehran's Baharestan square near the Parliament building square exhibited different missile systems, including ballistic missiles, solid-fuel surface-to-surface Sejjil missiles and the liquid-fuel Ghadr, according to AP.

Russian President Vladimir Putin signed a decree in 2015 lifting a ban on the delivery of the S-300 to Iran, explaining that his decision was motivated by Iran's drive to find a solution in talks over its nuclear program.